519
FZUS51 KBOX 212305
CWFBOX
COASTAL WATERS FORECAST FOR MASSACHUSETTS AND RHODE ISLAND
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
705 PM EDT TUE APR 21 2026
COASTAL WATERS FROM THE MERRIMACK RIVER MA TO WATCH HILL RI OUT
TO 60 NM
ANZ200-221200-
705 PM EDT TUE APR 21 2026
SYNOPSIS FOR MASSACHUSETTS AND RHODE ISLAND COASTAL WATERS
HIGH PRES WEAKENS AND SHIFTS EAST TONIGHT. LOW PRES BRINGS CLOUDS
AND SCATTERED SHOWERS OVER THE WATERS ON WED. HIGH PRES BUILDS IN
FOR LATE IN THE WEEK AND WEEKEND, IT WILL BE UNSETTLED WITH PERIODS
OF CLOUDS.
ANZ250-221200-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
705 PM EDT TUE APR 21 2026
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: N 2 FT AT 5 SECONDS AND S 2 FT AT 6 SECONDS.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND NE 1 FOOT AT
5 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
WED NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
DIMINISHING TO 5 TO 10 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE
DETAIL: SW 3 FT AT 4 SECONDS AND E 2 FT AT 8 SECONDS. PATCHY FOG.
A CHANCE OF SHOWERS AFTER MIDNIGHT WITH VSBY 1 TO 3 NM.
THU
W WINDS 5 TO 10 KT, BECOMING NW IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND E 2 FT AT
8 SECONDS.
THU NIGHT
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
N 2 FT AT 4 SECONDS AND SE 1 FOOT AT 6 SECONDS.
FRI AND FRI NIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: N 2 FT AT 4 SECONDS AND SE 1 FOOT AT 7 SECONDS.
SAT THROUGH SUN NIGHT
E WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ251-221200-
MASSACHUSETTS BAY AND IPSWICH BAY-
705 PM EDT TUE APR 21 2026
TONIGHT
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT THIS EVENING.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 3 SECONDS AND NE 2 FT AT
5 SECONDS.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND SW 2 FT AT 3 SECONDS.
A CHANCE OF SHOWERS IN THE AFTERNOON.
WED NIGHT
S WINDS 10 TO 15 KT, BECOMING SW 5 TO 10 KT AFTER
MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND
E 2 FT AT 8 SECONDS. PATCHY FOG.
THU
W WINDS 5 TO 10 KT, BECOMING NW IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: E 2 FT AT 8 SECONDS AND SW 1 FOOT AT
3 SECONDS.
THU NIGHT
NW WINDS AROUND 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: N 2 FT AT 4 SECONDS AND SE 1 FOOT AT 4 SECONDS.
FRI AND FRI NIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 7 SECONDS AND N 1 FOOT AT 4 SECONDS.
SAT THROUGH SUN NIGHT
E WINDS 10 TO 15 KT. SEAS AROUND 2 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ231-221200-
CAPE COD BAY-
705 PM EDT TUE APR 21 2026
TONIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: E
2 FT AT 8 SECONDS AND S 1 FOOT AT 4 SECONDS.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND NE 1 FOOT AT
4 SECONDS. A CHANCE OF SHOWERS.
WED NIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
SE 2 FT AT 4 SECONDS AND E 1 FOOT AT 7 SECONDS. PATCHY FOG. A
CHANCE OF SHOWERS IN THE EVENING.
THU
W WINDS 5 TO 10 KT, BECOMING NW IN THE AFTERNOON. SEAS
1 FOOT OR LESS. WAVE DETAIL: SW 1 FOOT AT 3 SECONDS AND E 1 FOOT
AT 5 SECONDS. PATCHY FOG IN THE MORNING.
THU NIGHT
NW WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS. WAVE
DETAIL: N 1 FOOT AT 3 SECONDS AND SE 1 FOOT AT 6 SECONDS.
FRI AND FRI NIGHT
N WINDS 5 TO 10 KT. SEAS 1 FOOT OR LESS.
WAVE DETAIL: NW 1 FOOT AT 3 SECONDS AND S 1 FOOT AT 7 SECONDS.
SAT THROUGH SUN NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ254-221200-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
705 PM EDT TUE APR 21 2026
TONIGHT
SE WINDS AROUND 5 KT, BECOMING S AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: N 2 FT AT 5 SECONDS AND E 2 FT AT
8 SECONDS.
WED
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 5 SECONDS AND W 1 FOOT AT
3 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
WED NIGHT
S WINDS 10 TO 15 KT, BECOMING SE 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND E
2 FT AT 9 SECONDS. PATCHY FOG. VSBY 1 TO 3 NM.
THU
SW WINDS 5 TO 10 KT, BECOMING NW IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND E 2 FT AT
9 SECONDS. PATCHY FOG IN THE MORNING.
THU NIGHT THROUGH FRI NIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO
3 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS AND S 2 FT AT 6 SECONDS.
SAT THROUGH SUN NIGHT
NE WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
WAVE DETAIL: E 3 FT AT 14 SECONDS AND NW 2 FT AT 5 SECONDS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ255-221200-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
705 PM EDT TUE APR 21 2026
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: N 2 FT AT 5 SECONDS AND E 2 FT AT
8 SECONDS.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: S 3 FT AT 5 SECONDS AND E 2 FT AT 7 SECONDS. A
CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS LIKELY IN THE
AFTERNOON.
WED NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
DIMINISHING TO 5 TO 10 KT AFTER MIDNIGHT. SEAS 3 TO 4 FT. WAVE
DETAIL: SE 3 FT AT 5 SECONDS AND E 2 FT AT 9 SECONDS. PATCHY FOG.
A CHANCE OF SHOWERS IN THE EVENING. VSBY 1 TO 3 NM.
THU
W WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SW 3 FT
AT 6 SECONDS AND E 2 FT AT 9 SECONDS. PATCHY FOG IN THE MORNING.
THU NIGHT THROUGH FRI NIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SW 3 FT AT 7 SECONDS AND E 2 FT AT 8 SECONDS.
SAT THROUGH SUN NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS UP TO
20 KT. SEAS 2 TO 3 FT. WAVE DETAIL: E 3 FT AT 8 SECONDS AND E
3 FT AT 15 SECONDS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ256-221200-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
705 PM EDT TUE APR 21 2026
TONIGHT
S WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND
NW 1 FOOT AT 3 SECONDS. A SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND E 1 FOOT AT
5 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
LIKELY IN THE AFTERNOON. PATCHY FOG IN THE AFTERNOON.
WED NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING E 5 TO 10 KT AFTER MIDNIGHT. SEAS 3 TO 4 FT. WAVE
DETAIL: NW 4 FT AT 5 SECONDS AND SE 4 FT AT 6 SECONDS. PATCHY
FOG. A CHANCE OF SHOWERS IN THE EVENING. VSBY 1 TO 3 NM.
THU
NW WINDS 5 TO 10 KT, BECOMING W 10 TO 15 KT IN THE
AFTERNOON. SEAS 3 TO 4 FT. WAVE DETAIL: W 3 FT AT 6 SECONDS AND
SE 2 FT AT 9 SECONDS.
THU NIGHT
N WINDS AROUND 10 KT. SEAS AROUND 3 FT. WAVE DETAIL:
NW 2 FT AT 3 SECONDS AND SW 2 FT AT 7 SECONDS.
FRI AND FRI NIGHT
E WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE
DETAIL: S 2 FT AT 6 SECONDS AND E 2 FT AT 7 SECONDS.
SAT THROUGH SUN NIGHT
E WINDS 15 TO 20 KT. SEAS 2 TO 4 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ232-221200-
NANTUCKET SOUND-
705 PM EDT TUE APR 21 2026
TONIGHT
SE WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
AROUND 2 FT. WAVE DETAIL: NW 1 FOOT AT 5 SECONDS AND E 1 FOOT AT
5 SECONDS.
WED
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 3 SECONDS AND W 1 FOOT AT
4 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
LIKELY IN THE AFTERNOON.
WED NIGHT
SE WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT
AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 2 FT AT 6 SECONDS
AND E 1 FOOT AT 4 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE
EVENING. VSBY 1 TO 3 NM AFTER MIDNIGHT.
THU
W WINDS 5 TO 10 KT, BECOMING NW IN THE AFTERNOON. SEAS
AROUND 2 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND E 1 FOOT AT
4 SECONDS. PATCHY FOG IN THE MORNING.
THU NIGHT THROUGH FRI NIGHT
N WINDS 5 TO 10 KT. SEAS AROUND
2 FT. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND S 1 FOOT AT
6 SECONDS.
SAT THROUGH SUN NIGHT
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT.
WAVE DETAIL: E 2 FT AT 10 SECONDS AND NE 1 FOOT AT 2 SECONDS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ233-221200-
VINEYARD SOUND-
705 PM EDT TUE APR 21 2026
TONIGHT
S WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT AFTER
MIDNIGHT. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT AFTER MIDNIGHT.
WAVE DETAIL: E 1 FOOT AT 3 SECONDS AND S 1 FOOT AT 3 SECONDS,
BECOMING SW 2 FT AT 3 SECONDS AND E 1 FOOT AT 4 SECONDS.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND E 1 FOOT AT
5 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
LIKELY IN THE AFTERNOON.
WED NIGHT
SE WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT
AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: W 3 FT AT 5 SECONDS
AND SE 3 FT AT 6 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE
EVENING.
THU
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT
AT 6 SECONDS AND E 1 FOOT AT 4 SECONDS.
THU NIGHT AND FRI
NW WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: SW 2 FT AT 6 SECONDS AND NW 1 FOOT AT 3 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT. SEAS
AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR LESS. WAVE DETAIL: NE
1 FOOT AT 2 SECONDS AND NW 1 FOOT AT 3 SECONDS, BECOMING NE
1 FOOT AT 2 SECONDS AND NW 1 FOOT AT 4 SECONDS.
SAT THROUGH SUN NIGHT
NE WINDS 10 TO 15 KT. SEAS AROUND 2 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ234-221200-
BUZZARDS BAY-
705 PM EDT TUE APR 21 2026
TONIGHT
S WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT AFTER
MIDNIGHT. SEAS 1 FOOT OR LESS, THEN AROUND 2 FT AFTER MIDNIGHT.
WAVE DETAIL: S 1 FOOT AT 2 SECONDS AND E 1 FOOT AT 3 SECONDS,
BECOMING SW 1 FOOT AT 3 SECONDS AND NW 1 FOOT AT 4 SECONDS.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SW 2 FT AT 5 SECONDS AND E 1 FOOT AT
4 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
LIKELY IN THE AFTERNOON.
WED NIGHT
SE WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT
AFTER MIDNIGHT. SEAS AROUND 2 FT. WAVE DETAIL: SE 2 FT AT
5 SECONDS AND W 2 FT AT 5 SECONDS. PATCHY FOG. A CHANCE OF
SHOWERS IN THE EVENING.
THU
W WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW 2 FT
AT 5 SECONDS AND E 1 FOOT AT 4 SECONDS.
THU NIGHT THROUGH FRI NIGHT
N WINDS 5 TO 10 KT. SEAS AROUND
2 FT. WAVE DETAIL: N 1 FOOT AT 4 SECONDS AND SW 1 FOOT AT
6 SECONDS.
SAT THROUGH SUN NIGHT
NE WINDS 10 TO 15 KT. SEAS AROUND 2 FT.
WAVE DETAIL: E 2 FT AT 8 SECONDS AND N 1 FOOT AT 3 SECONDS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ235-221200-
RHODE ISLAND SOUND-
705 PM EDT TUE APR 21 2026
TONIGHT
S WINDS 10 TO 15 KT. SEAS AROUND 2 FT. WAVE DETAIL: S
2 FT AT 3 SECONDS AND NW 2 FT AT 3 SECONDS. A SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT.
WED
S WINDS AROUND 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND E 2 FT AT 4 SECONDS.
A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS LIKELY IN THE
AFTERNOON. PATCHY FOG IN THE AFTERNOON WITH VSBY 1 TO 3 NM.
WED NIGHT
SE WINDS 10 TO 15 KT, BECOMING E 5 TO 10 KT AFTER
MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: NW 3 FT AT 5 SECONDS AND
SE 3 FT AT 6 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE
EVENING. VSBY 1 TO 3 NM AFTER MIDNIGHT.
THU
NW WINDS 5 TO 10 KT, BECOMING W 10 TO 15 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT AT 6 SECONDS AND
SE 2 FT AT 9 SECONDS.
THU NIGHT
N WINDS AROUND 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL:
NW 2 FT AT 3 SECONDS AND S 2 FT AT 7 SECONDS.
FRI AND FRI NIGHT
NE WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 6 SECONDS AND N 1 FOOT AT 3 SECONDS.
SAT THROUGH SUN NIGHT
E WINDS 10 TO 15 KT WITH GUSTS UP TO
20 KT. SEAS 2 TO 3 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ237-221200-
BLOCK ISLAND SOUND-
705 PM EDT TUE APR 21 2026
TONIGHT
S WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: SW
1 FOOT AT 3 SECONDS AND E 1 FOOT AT 4 SECONDS. A CHANCE OF
SHOWERS AFTER MIDNIGHT.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND E 1 FOOT AT
3 SECONDS. SHOWERS LIKELY. PATCHY FOG IN THE AFTERNOON WITH VSBY
1 TO 3 NM.
WED NIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT.
SEAS 2 TO 3 FT. WAVE DETAIL: N 3 FT AT 4 SECONDS AND SE 3 FT AT
7 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS IN THE EVENING. VSBY
1 TO 3 NM.
THU
W WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SW 3 FT
AT 6 SECONDS AND SE 2 FT AT 9 SECONDS.
THU NIGHT
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
2 FT AT 7 SECONDS AND NW 1 FOOT AT 3 SECONDS.
FRI AND FRI NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE
DETAIL: S 2 FT AT 6 SECONDS AND N 1 FOOT AT 2 SECONDS.
SAT THROUGH SUN NIGHT
E WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ230-221200-
BOSTON HARBOR-
705 PM EDT TUE APR 21 2026
TONIGHT
S WINDS 10 TO 15 KT. WAVES AROUND 2 FT.
WED
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES AROUND 2 FT. A CHANCE OF SHOWERS.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES AROUND 2 FT IN THE
EVENING, THEN 1 FOOT OR LESS. PATCHY FOG. A CHANCE OF SHOWERS IN
THE EVENING.
THU
W WINDS 5 TO 10 KT, BECOMING NW 10 TO 15 KT IN THE
AFTERNOON. WAVES 1 FOOT OR LESS, THEN AROUND 2 FT IN THE
AFTERNOON.
THU NIGHT
NW WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT
AFTER MIDNIGHT. WAVES AROUND 2 FT IN THE EVENING, THEN 1 FOOT OR
LESS.
FRI AND FRI NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FOOT OR LESS.
SAT THROUGH SUN NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FOOT OR
LESS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ236-221200-
NARRAGANSETT BAY-
705 PM EDT TUE APR 21 2026
TONIGHT
S WINDS AROUND 10 KT. WAVES 1 FOOT OR LESS, THEN
AROUND 2 FT AFTER MIDNIGHT. A SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. WAVES AROUND
2 FT. SHOWERS LIKELY. PATCHY FOG IN THE AFTERNOON WITH VSBY 1 TO
3 NM.
WED NIGHT
SE WINDS 5 TO 10 KT. WAVES AROUND 2 FT. PATCHY FOG.
A CHANCE OF SHOWERS IN THE EVENING. VSBY 1 TO 3 NM AFTER
MIDNIGHT.
THU
NW WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. WAVES AROUND 2 FT.
THU NIGHT AND FRI
NW WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
FRI NIGHT
SE WINDS 5 TO 10 KT, BECOMING NE AFTER MIDNIGHT.
WAVES 1 FOOT OR LESS.
SAT THROUGH SUN NIGHT
NE WINDS 5 TO 10 KT. WAVES AROUND 2 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ280-221200-
OCEAN WATERS FROM THE MERRIMACK RIVER TO PLYMOUTH FROM 40 TO
60 NM-
705 PM EDT TUE APR 21 2026
TONIGHT
S WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH
GUSTS UP TO 20 KT AFTER MIDNIGHT. SEAS 2 TO 3 FT. WAVE DETAIL: S
2 FT AT 5 SECONDS AND N 2 FT AT 5 SECONDS.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND NE 1 FOOT AT
4 SECONDS.
WED NIGHT
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS
2 TO 4 FT. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND E 2 FT AT
8 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO 3 NM AFTER
MIDNIGHT.
THU
SW WINDS AROUND 10 KT, BECOMING NW IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: SW 2 FT AT 4 SECONDS AND E 2 FT AT
8 SECONDS.
THU NIGHT THROUGH FRI NIGHT
N WINDS 10 TO 15 KT WITH GUSTS UP
TO 20 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N 2 FT AT 4 SECONDS AND S
2 FT AT 6 SECONDS.
SAT THROUGH SUN NIGHT
E WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
WAVE DETAIL: E 3 FT AT 10 SECONDS AND E 3 FT AT 14 SECONDS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ281-221200-
OCEAN WATERS FROM PROVINCETOWN TO NANTUCKET FROM 20 TO 60 NM-
705 PM EDT TUE APR 21 2026
TONIGHT
E WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: N 3 FT AT 5 SECONDS AND E 2 FT AT
8 SECONDS.
WED
S WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
UP TO 20 KT IN THE AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 5 SECONDS AND NW 1 FOOT AT 4 SECONDS.
WED NIGHT
SE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 3 TO 4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND E
2 FT AT 9 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO
3 NM AFTER MIDNIGHT.
THU
S WINDS 5 TO 10 KT, BECOMING NW IN THE AFTERNOON. SEAS
3 TO 4 FT. WAVE DETAIL: SE 3 FT AT 5 SECONDS AND E 2 FT AT
8 SECONDS.
THU NIGHT THROUGH FRI NIGHT
N WINDS 10 TO 15 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SW 3 FT AT 7 SECONDS AND N 2 FT AT 4 SECONDS.
SAT THROUGH SUN NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS UP TO
20 KT. SEAS 2 TO 4 FT. WAVE DETAIL: E 4 FT AT 14 SECONDS AND N
2 FT AT 4 SECONDS.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ282-221200-
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
705 PM EDT TUE APR 21 2026
TONIGHT
E WINDS 5 TO 10 KT, BECOMING S AFTER MIDNIGHT. SEAS
2 TO 3 FT. WAVE DETAIL: N 3 FT AT 5 SECONDS AND E 2 FT AT
8 SECONDS.
WED
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
SEAS 2 TO 4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND NW 2 FT AT
5 SECONDS. A CHANCE OF SHOWERS IN THE AFTERNOON.
WED NIGHT
SE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE
EVENING. SEAS 4 TO 5 FT. WAVE DETAIL: SE 4 FT AT 5 SECONDS AND E
3 FT AT 9 SECONDS. PATCHY FOG. A CHANCE OF SHOWERS. VSBY 1 TO
3 NM.
THU
N WINDS 5 TO 10 KT, BECOMING W 10 TO 15 KT IN THE
AFTERNOON. SEAS 4 TO 5 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS AND E
3 FT AT 9 SECONDS.
THU NIGHT AND FRI
N WINDS 5 TO 10 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: SW 4 FT AT 7 SECONDS AND N 2 FT AT 5 SECONDS.
FRI NIGHT
N WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL: N
1 FOOT AT 5 SECONDS AND SW 1 FOOT AT 6 SECONDS.
SAT THROUGH SUN
NE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT.
SEAS 2 TO 4 FT.
SUN NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT. SEAS
3 TO 5 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
ANZ283-221200-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
705 PM EDT TUE APR 21 2026
TONIGHT
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: N
2 FT AT 5 SECONDS AND E 2 FT AT 8 SECONDS.
WED
S WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT. SEAS 2 TO
4 FT. WAVE DETAIL: SE 3 FT AT 6 SECONDS AND W 1 FOOT AT
4 SECONDS. A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS
LIKELY IN THE AFTERNOON.
WED NIGHT
SE WINDS 10 TO 15 KT WITH GUSTS UP TO 20 KT,
BECOMING E 5 TO 10 KT AFTER MIDNIGHT. SEAS 4 TO 5 FT. WAVE
DETAIL: E 4 FT AT 6 SECONDS AND NW 1 FOOT AT 5 SECONDS. PATCHY
FOG. A CHANCE OF SHOWERS IN THE EVENING.
THU
NW WINDS 5 TO 10 KT, BECOMING W 10 TO 15 KT IN THE
AFTERNOON. SEAS 3 TO 4 FT. WAVE DETAIL: SW 3 FT AT 7 SECONDS AND
E 3 FT AT 8 SECONDS.
THU NIGHT AND FRI
NW WINDS 10 TO 15 KT. SEAS 2 TO 4 FT. WAVE
DETAIL: SW 3 FT AT 7 SECONDS AND N 2 FT AT 4 SECONDS.
FRI NIGHT
E WINDS 5 TO 10 KT. SEAS AROUND 2 FT. WAVE DETAIL:
NE 1 FOOT AT 3 SECONDS AND W 1 FOOT AT 5 SECONDS.
SAT THROUGH SUN
E WINDS 15 TO 20 KT. SEAS 2 TO 4 FT.
SUN NIGHT
NE WINDS 20 TO 25 KT. SEAS 4 TO 5 FT.
SEAS ARE REPORTED AS SIGNIFICANT WAVE HEIGHT, WHICH IS THE
AVERAGE OF THE HIGHEST THIRD OF THE WAVES. INDIVIDUAL WAVE
HEIGHTS MAY BE MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.
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